Cited by 4,741RNA and protein synthesis mechanismsRNA Research and SplicingGenomics and Chromatin Dynamics

Point mutations define a sequence flanking the AUG initiator codon that modulates translation by eukaryotic ribosomes

Kozak, Marilyn·1986·Cell

Abstract

By analyzing the effects of single base substitutions around the ATG initiator codon in a cloned preproinsulin gene, I have identified ACCATGG as the optimal sequence for initiation by eukaryotic ribosomes. Mutations within that sequence modulate the yield of proinsulin over a 20-fold range. A purine in position -3 (i.e., 3 nucleotides upstream from the ATG codon) has a dominant effect; when a pyrimidine replaces the purine in position -3, translation becomes more sensitive to changes in positions -1, -2, and +4. Single base substitutions around an upstream, out-of-frame ATG codon affect the efficiency with which it acts as a barrier to initiating at the downstream start site for preproinsulin. The optimal sequence for initiation defined by mutagenesis is identical to the consensus sequence that emerged previously from surveys of translational start sites in eukaryotic mRNAs. The mechanism by which nucleotides flanking the ATG codon might exert their effect is discussed.

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Crossref · 10.1016/0092-8674(86)90762-2

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Authors
Kozak, M.
Affiliations
University of Pittsburgh (US)
Corresponding author
Kozak, Marilyn
Venue
Cell
Publisher
Elsevier BV
Published
1986-01
Volume
44
Issue
2
Pages
283-292
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2154128645
Cited by
4,741
References
0
Citations by year
2026: 61 · 2025: 49 · 2024: 54 · 2023: 48 · 2022: 60 · 2021: 57 · 2020: 76 · 2019: 56 · 2018: 60 · 2017: 58 · 2016: 49 · 2015: 62 · 2014: 64 · 2013: 50 · 2012: 52
FWCI
104.73
Type
journal article
Language
en
Open access
closed
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of General Medical Sciences (GM 33915)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
translation initiation, initiator codon, ribosome binding site, translation initiation sites, 80S ribosome
MeSH terms
Animals, Base Sequence, Binding Sites, Chlorocebus aethiops, Cloning, Molecular, Eukaryotic Cells, Hydrogen Bonding, Insulin, Mutation, Nucleic Acid Conformation, Peptide Chain Initiation, Translational, Proinsulin, Protein Precursors, Ribosomes, RNA, Messenger, RNA, Ribosomal

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